We aim to achieve stable printable 2D inks with environmental friendly solvents using a surfactant as a stabilizer. This study focuses on the influence of the pH on the stability of the MoS2 dispersions in acetic acid at concentrations ranging from pH 1 to 5. The effectiveness of liquid-based exfoliation using shear exfoliation was also evaluated though SEM images and resulted in very thin nanosheets. We observed that at pH concentrations higher than 2, the dispersions were more stable.
Viviane Forsberg, Renyun Zhang, Magnus Hummelgård, Håkan Olin, "The Influence of pH on the Stability of Inks of Two-Dimensional Materials for Digital Fabrication" in Proc. IS&T Printing for Fabrication: Int'l Conf. on Digital Printing Technologies (NIP33), 2017, pp 29 - 31, https://doi.org/10.2352/ISSN.2169-4451.2017.33.29